# Locale::lookup

# locale_lookup

(PHP 5 >= 5.3.0, PHP 7, PHP 8, PECL intl >= 1.0.0)

Locale::lookup -- locale_lookup — Searches the language tag list for the best match to the language

### Beschreibung

Objektorientierter Stil

public static Locale::lookup(
array `$languageTag`,
string `$locale`,
bool `$canonicalize` = `false`,
?string `$defaultLocale` = `null`
): ?string

Prozeduraler Stil

locale_lookup(
array `$languageTag`,
string `$locale`,
bool `$canonicalize` = `false`,
?string `$defaultLocale` = `null`
): ?string

Searches the items in `languageTag` for the best match to the language range specified in `locale` according to RFC 4647's lookup algorithm.

### Parameter-Liste

`languageTag`

  An array containing a list of language tags to compare to `locale`. Maximum 100 items allowed.

`locale`

  The locale to use as the language range when matching.

`canonicalize`

  If true, the arguments will be converted to canonical form before matching.

`defaultLocale`

  The locale to use if no match is found.

### Rückgabewerte

The closest matching language tag or default value.

Gibt `null` zurück, wenn die Länge von `locale` `INTL_MAX_LOCALE_LEN` überschreitet.

### Changelog

Version | Beschreibung
--- | ---
7.4.0 | `defaultLocale` is nullable now.

### Beispiele

Beispiel #1 locale_lookup() example

`<?php
$arr = array(
'de-DEVA',
'de-DE-1996',
'de',
'de-De'
);
echo locale_lookup($arr, 'de-DE-1996-x-prv1-prv2', true, 'en_US');
?>`

Beispiel #2 OO example

`<?php
$arr = array(
'de-DEVA',
'de-DE-1996',
'de',
'de-De'
);
echo Locale::lookup($arr, 'de-DE-1996-x-prv1-prv2', true, 'en_US');
?>`

Das oben gezeigte Beispiel erzeugt folgende Ausgabe:

    de_de_1996

### Siehe auch

- locale_filter_matches() - Checks if a language tag filter matches with locale

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